31323046046640 has 160 divisors (see below), whose sum is σ = 97161258305280. Its totient is φ = 8347668876288.

The previous prime is 31323046046609. The next prime is 31323046046671. The reversal of 31323046046640 is 4664064032313.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31323046046609) and next prime (31323046046671).

It is a super-2 number, since 2×31323046046640² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31323046046592 and 31323046046601.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4631527899 + ... + 4631534661.

It is an arithmetic number, because the mean of its divisors is an integer number (607257864408).

Almost surely, 2^{31323046046640} is an apocalyptic number.

31323046046640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31323046046640 is an abundant number, since it is smaller than the sum of its proper divisors (65838212258640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31323046046640 is a wasteful number, since it uses less digits than its factorization.

31323046046640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15811 (or 15805 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 42.

The spelling of 31323046046640 in words is "thirty-one trillion, three hundred twenty-three billion, forty-six million, forty-six thousand, six hundred forty".